Boy Flying Ticketless Sparks Airport Security Probe

Federal and airline security officials are reviewing protocols at Minneapolis-St. Paul International Airport after a ticketless 9-year-old boy slipped past security there and boarded a flight for Las Vegas.

The Transportation Security Administration said it was reviewing footage from the incident last week showing the boy passing through security, and that it was investigating whether barriers around the checkpoint should be reconfigured to prevent any recurrence. The TSA said the boy, an apparent runaway whose identity...